Montgomery County's SSURGO septic rating

Very limited

Montgomery County, TN: USDA's soil survey calls 63.6% of the county "Very limited" for a septic leach field. This is the reading that pushes a project toward an engineered system rather than a conventional one, and it covers 63.6% of Montgomery County's land. The county spans 539.169 square miles, home to 246,025 people.

What this number does and doesn't tell you

Montgomery County's rating is an average across the whole county, not a promise about any one lot inside it. Budget $750-$1,850 for a real perc test on any specific parcel - that's the only figure a permit application accepts.

Montgomery County: conventional vs. engineered cost

63.6% of Montgomery County carrying a "Very limited" reading changes the realistic budget here. Conventional systems run $3,000-$8,000 where they pass; where they don't, engineered alternatives (mound or aerobic treatment, whichever the health department requires) run $10,000-$40,000 - budget toward the higher figure until a perc test says otherwise.

Montgomery County's rank among Tennessee counties

Among the 3,058 rated counties on this site, Montgomery County, TN ranks 2,643 most-constrained nationally, and 87 of 95 within Tennessee.

Before you act on this

How this rating is built, and its real limits · Conventional vs. engineered septic systems